dress up
phrasal verb with dress verb uk/dres/ us/dres/
穿正装,盛装
to put on formal clothes for a special occasion
You don't need to dress up to go to the mall - jeans and a T-shirt are fine. 去购物不必穿正装——牛仔裤加短袖衫就可以了。
改换装束,装扮
to put on special clothes in order to change your appearance
Little kids usually love dressing up in their mothers' clothes. 小孩子通常喜欢穿妈妈的衣服。
He dressed up as a cowboy for the party. 他装扮成牛仔去参加聚会。